Answers

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Image from: Trowel Occupations (2004) DfES Publications pg 152

Image from: Trowel Occupations (2004) DfES Publications pg 154

1. These dimensions could be scaled-off using a ruler.
   Why is it better to use the written numbers?
   
   
2. It is common practice for openings to have a tolerance of 10 mm. Why?
   
   
3. Look carefully at the sizes of the openings
   It is a brick building and these openings will work
   full-bricks to prevent broken bonds
   
   
4. Calculate how many bricks will fit over
   each of the openings
   
   
5. Which of the other dimensions will work bricks?
   Answer: All of them...Why?
   
   
   

ANSWERS

Take care, this may contains deliberate mistakes

QUESTION 4

910 - 10mm = 900 900 = 4 bricks 225 1810 - 10mm = 1800 1810 = 8 bricks 225 2260 - 10mm = 2250 2250 = 10 bricks  225 QUESTION 5 450 = 2 bricks 225 215 = length of 1 brick, without joint 440 = length of 2 bricks without last joint 328 = 1½ bricks = 225 x 1.5 = 337.5 5615 = 25 bricks  225 some text

Some normal writting